1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
|
import { type SpriteSpec, SPRITE_SPECS } from ".";
import { SOUND_SPECS, SoundSpec } from "./sounds";
export const FONT = new FontFace("scientifica", "url(/fonts/scientifica.ttf)");
FONT.load().then((font) => {
document.fonts.add(font);
});
export const IMAGES = new Map<string, HTMLImageElement>();
export const SOUNDS = new Map<string, HTMLAudioElement>();
export const loadSpritesIntoImageElements = (
spriteSpecs: Partial<SpriteSpec>[],
): Promise<void>[] => {
const spritePromises: Promise<void>[] = [];
for (const spriteSpec of spriteSpecs) {
if (spriteSpec.sheet) {
const img = new Image();
img.src = spriteSpec.sheet;
IMAGES.set(spriteSpec.sheet, img);
spritePromises.push(
new Promise((resolve) => {
img.onload = () => resolve();
}),
);
}
if (spriteSpec.states) {
spritePromises.push(
...loadSpritesIntoImageElements(Array.from(spriteSpec.states.values())),
);
}
}
return spritePromises;
};
export const loadSoundsIntoAudioElements = (
soundSpecs: SoundSpec[],
): Promise<void>[] => {
const soundPromises: Promise<void>[] = [];
for (const soundSpec of soundSpecs) {
if (soundSpec.url) {
const promise = fetch(soundSpec.url)
.then((response) => response.blob())
.then((blob) => {
const audio = new Audio();
audio.src = URL.createObjectURL(blob);
audio.volume = soundSpec.volume ?? 1;
SOUNDS.set(soundSpec.name, audio);
return new Promise<void>((resolve, rej) => {
audio.oncanplaythrough = () => {
resolve();
};
audio.onerror = (e) => {
console.error(soundSpec);
rej(e);
};
});
});
soundPromises.push(promise);
}
if (soundSpec.states) {
soundPromises.push(
...loadSoundsIntoAudioElements(Array.from(soundSpec.states.values())),
);
}
}
return soundPromises;
};
export const loadAssets = () =>
Promise.all([
...loadSpritesIntoImageElements(
Array.from(SPRITE_SPECS.keys()).map(
(key) => SPRITE_SPECS.get(key) as SpriteSpec,
),
),
FONT.load(),
...loadSoundsIntoAudioElements(Array.from(SOUND_SPECS.values())),
]);
|
